Fix grammar error in meta_desc: 'Lean' -> 'Learn'

Co-authored-by: Cam Soper <CamSoper@users.noreply.github.com>

Author: github-actions[bot]

content/docs/idp/developer-portals/templates/_index.md

@@ -2,7 +2,7 @@
 title: Organization templates
 title_tag: Get started with organization templates
 h1: Building developer portals with organization templates
-meta_desc: Lean how to build template projects and configure them to work with your Pulumi organization.
+meta_desc: Learn how to build template projects and configure them to work with your Pulumi organization.
 menu:
   idp:
     name: Organization templates